Saw machine



Oct. 10, 1939 c. RAsMussE-N SAW MACHINE Original Filed May 9, 1956 T# f, H@ f w U, a I? e Mw \f HI I v ,i 1 Y 2 L WOA if mi@ x 1\ I l l 7 w I ww w Oct. 10, 1939. c. RAsMussEN SAW MACHINE 2 Sheets-Sheet 2 Original Filed May 9, 1936 Patente-c1 Oct. 10, 1939 PATENT OFFICE SAW MACHINE Charles Rasmussen, Racine, Wis., assigner of one-half to John Oster, Racine, Wis.

Original application May 9, 1936, Serial No.

Divided and this application March 26, 1937, Serial N0. 133,3143=y 5 Claims.

The present invention relates in general to saw machines.

One of the objects of my invention is to provide an improved sliding mounting for power op- 5 erated saws.

Another object is to provide a novel sliding out construction for a power saw.

A further object is to provide an improved form of mounting for a power saw in which the torsional strain of the saw frame is substantially reduced.

Other objects of my invention will appear in the following detailed description taken in conjunction with the accompanying drawings.

' The present application is a division of my c0- pending application Serial No. 78,841, iled May 9, 1936 relating to Saw machines.

Fig. 1 is a side elevation of my improved saw mounting and frame therefor.

Fig. 2 is a cross section of the saw frame taken along the line 2--2 of Fig. 1.

Fig. 3 is a similar view taken along the line 3 3 of Fig. l looking in the direction of the arrows.

Fig. 4 is a section taken along the line 4 4 of Fig. l looking in the direction of the arrows.

Fig. 5 is a fragmentary sectional elevation of the saw frame and its vertical adjusting means; and

Fig. 6 is an enlarged detail of the saw counterbalancing mechanism partially shown in Fig. 5.

The accompanying drawings do not show the power mechanism for operating the saw.

It may be stated that one method of operating the saw is shown in my co-pending application heretofore referred to. It will suiiice to state that vertical movement to the saw blade |2| is imparted through the main saw frame |66 and that horizontal movement to the saw blade is imparted by reciprocating the saw frame I |1.

The Vertical movement may be obtained by reason of the fact that the saw frame has secured thereto a rack |09 meshing with a spur gear splined to a shaft Any suitable source of power to drive shaft may be provided. The lower end of the rack |69 has a steel band ||2 suitably secured thereto, the other end of which is attached to an arcuate member ||3 pivotally mounted `at H4. The arcuate member has an extension I| to which is secured an adjustable compression spring ||6, the other end of which is mounted on the saw frame base (not shown). The compression spring ||6 serves to counterbalance the weight of the saw frame |06 so that it may be moved easily by the rack |09 and the pinion |||l which function to raise and lower the saw frame so as to bring the saw into contact with the work.

The saw frame |66 provides a horizontally slidable mounting for the inner hack saw frame ||1 which carries the adjustable saw blade 2|. 'Ihe saw blade |2| is suitably held by a member |22 attached to the frame ||1 and an adjustable member |23 and is adapted to be tensioned by an adjustable screw |24.

The inner saw frame |1 slides in channels |25 in the saw frame |66. The frame ||1 carries bearing members |26 cooperating with one channel |25 and adjustable bearing members |21 cooperating with the other channel |25. Each of the bearing members |21 are adjustable by means of the bolts 28. There are two bearing members such as |21, each of which are connected to the saw frame ||1 by circular extensions |29. Similar circular extensions |36 are provided on the slides |26 and both parts |29 and |36 are rotatably mounted in the circular openings |33 which extend through bosses |32 formed in the upper horizontal portion of the inner saw frame ||1. The saw frame ||1 thus contacts the bearing members |26 at only two points and these points are in the openings |33. There are four of the adjusting bolts |28 by which the bearing members |21 may be positioned in the frame ||1 to provide compensation for wear. Oil holes |3| are provided for lubricating purposes in the outer saw frame |06. The construction of the bearing members and their mounting to cooperate with the inner saw frame 1 is such that should there be any bending of the upper portion of the inner saw frame |1 as a result of the adjustment of the tension of the saw blade 2|, the frame ||1 may bend without in any way altering the bearing contact in the slides 25 by bearing members |21 and |26, since movement of the saw frame ||1 is permitted as it only contacts the bearing members at two points.

This improved form of sliding mounting is highly effective in power saws, and particularly when the saw is employed in the cutting of hard materials, since tensional strain of the frame |1, even to the extent of warping, will have no effect upon its sliding contact.

My invention may be variously modified without departing from the spirit and scope thereof as indicated in the appended claims.

I claim:

1. In a sawing machine, the combination of a saw frame, an inner saw frame mounted for horizontal reciprocating movement on the rst saw frame, a saw blade carried by said inner frame, means for placing tension upon said saw blade and pivotally mounted parallel sides bearings between said frames adapted to compensate for the position of the inner frame in accordance with the tension placed upon said blade.

2. In a sawing machine, the combination of a saw frame, an inner saw frame mounted for horizontal reciprocating movement on the iirst saw frame, bearings between said frames to permit horizontal reciprocating movement, said bearings pivoted on said inner frame and mounted in parallel guides in said rst saw frame, thereby adapted to compensate for limited vertical warping of the inner frame.

3. In apparatus of the class described, the combination of a supporting frame having a pair of spaced parallel horizontal track members, a saw frame mounted for horizontal reciprocating movement in said parallel track members, the cooperating members between said saw frame and said frame including pairs of bearing members pivotally connected to said saw frame and having parallel sided jib portions engaging said parallel tracks, said bearing members having adjusting means for spreading the same to engage said parallel tracks and being pivoted at two spaced points to permit limited warping movement of said saw frame.

4. In a sawing machine, the combination of a saw frame, means for vertically reciprocating said saw frame, an inner saw frame mounted for horizontal reciprocating movement on the first saw frame, a saw blade carried by said inner frame, means for placing tension upon said saw blade and pivotally mounted parallel sided bearings between said frames adapted to compensate for the position of the inner frame in accordance with the tension placed upon said blade.

5. In a sawing machine, the combination of a saw frame, means for vertically reciprocating said saw frame, an inner saw frame mounted for horizontal reciprocating movement on the iirst saw frame, bearings between said frames to permit horizontal reciprocating movement, said bearings pivoted to and adjacent the ends of one frame and mounted in parallel guides in the other, said bearings having portions complemental to said guides and thereby adapted to compensate for limited vertical warping of the inner frame.

CHARLES RASMUSSEN. 

